Hoisting-engine



(No Model.)

4 Sheets-Sheet 2. E.. D. LEAVITT. Jr.

HOISTING ENGINE.

No. 402,257. Patented Apr; 30, 1889;

lllllllllllflillk u. unnnnfi m|| Invenlor Erasmusj W LMOML 4.Leavill,Jn, by .flllorney,

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4 Sheets-Sheet 4. E. D.LEAVITT, Jr.

(-NO Modem HOISTING ENGINE. V NO. 402.257, Patented Apr. 30, 1889.

N- PETFRS. Phnlulilhbgnpher. Washingmn, D. C,

Invenlor': I I.

UNITED STATES PATENT OFFICE.

ERASMUS D. LEAVITT, JR, OF OAMBRIDGEPORT, MASSACHUSETTS.

HOlSTlNG-ENGINE.

SPECIFICATION forming part of Letters Patent N0. 402,257, dated April30,1889.

Application filed October 12, 1888. Serial No. 287,953. (No model.)

To all whom it may concern.-

Be it known that I, ERAsMUs D. LEAvIrr,

J r., of Cambridgeport, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inHoisting-Engines, of which the following,

taken in connection with the accompanying drawings, is a specification.

in mining communities where steam hoisting-engines are used for thepurpose of raising ore from the mines it is frequently found desirableto transmit to the hoisting-drum an intermittent motion which shall beentirely independent of any motion which may be transmitted from themain engine; and it is to accomplish this result which is the object ofthis invention, which consists in certain novel features ofconstruction, arrangement,

and combination of parts, which will be read ily understood by referenceto the description of the drawings and to the claims to be hereinaftergiven.

Of the drawings, Figure 1 represents an elevation of my improved devicefor imparting tothe hoisting-drum an intermittent rotary motion andshowing said drum cut in section. Fig. 2 represents a central verticallongitudinal sectional elevation of the fleeting-engine of said device.a similar sectional elevation of the fleetingstrap cross-head and itsbed-plate, the fleeting 7 represents a transverse sectional elevation ofthe same, the cutting-plane being on line 2 2 on Fig. 5. Fig. 8represents a transverse sectional elevation of the same, thecuttingplane being on line 3 3 on Fig. 5. Fig. 9 represents. a sectionalelevation of a portion of one of-the sliding pipes and its packing. Fig.10 represents a transverse sectional elevation of the fleeting-strapcross,head.- Fig. 11 rep- Fig. 3 represents resents a section of theguide for the fleetingengine cross-head. Fig. 12 represents a section ofthe guide for the fleeting-strap crosshead. Figs. 13 and 14 representdetails of the fleeting-strap end connections. Figs. 15, 16, and 17represent, respectively, a rear ele' vation, a side elevation, andafront elevation of the hydraulic valve-gear. -Fig. 18 represents asectional elevation of the Valve stand and chest, the cutting-planebeing on line 4 4 on Fig. 20. Fig. 19 represents a horizontal section ofthe same, the cutting-plane bein on line 5 5 on Fig. 20. Fig. 20represents afront elevation of the upper portion of the valvestand. Fig.21 represents a sectional elevation, the cutting-plane being on line 6 6on Fig. 16.

In the drawings, A is the bed-plate, upon which is secured the cylinderB, in which is mounted the piston B to. which is attached the piston-rodB the outer end of which is fastened securely to the trunnion-block C bymeans of the key a, whichblock O is provided with the trunnions a at,extending from opposite sides thereof into suitable bearings in the sidebars, 0 C, of the fleeting-engine cross-head. The side bars, 0' C, aresecured together by the transverse bars 0 0 the ends of which projectbeyond said side bars, 0 C, into'the open slots a a formed in the guides0 so that said frame 0' O C C may be reciprocated back and forth thereinas the piston B is reciprocated within the cylinder A.

To the side bars, 0' C, and above the transverse bars 0 C are securedthe two cylinders D and D, the former of which is somewhat larger thanthe other in diameter. The ends of these cylinders which are toward eachother are provided with suitable openings to receive the plunger D whichis adapted to reciprocate within said cylinders, which are securely tiedtogether at their upper sides by the tie-rod b.

- To the plunger D is pivoted at b the link 19 to the free end of whichis pivoted the upper end of the lever E, which is mounted upon thefulcrum-pin c, secured in the side bars, C C, and which extends beyondsaid fulcrum-pin c, and has pivoted to its lower end one end of theconnecting-'rod'F, the op-- posite end of which is pivoted to the lowerend of the lever F, which is mounted upon the fulcrum-pin d, secured inthe cross-head G, which is provided with laterally-projecting lips d,which extend into the grooves (Z formed in the guides G upon either sideof said cross-head G.

The fulcrum-pin c is connected to the tulcrum-pin d by means of the rodH, so that the cross-head G will reciprocate whenever the side-bars, CC, with the pin c, are reciprocated; but the grooves d are made curvedand concentric to the axis of the hoistingdrnm, which is locatedimmediately above the center of said guides G, as shown in Fig. 1, sothat when said cross-head G is reciprocated it will always remain thesame distance from the axis of the shaft 1, upon which the hoisting-drumis mounted, only that portion of which is shown in the drawings which isknown as the brake-wheel J, which forms a part of and conforms to allthe motions of the hoistil'ig-drum.

To the upper end of the lever F is pivoted the link J, the opposite endof which is pivoted to the casting J secured to one end of the steelstrap K in any well-known manner. The steel strap K passes nearly aroundthe brake wheel J, and has secured to its other end another similarcasting or end piece, K, to which is pivoted in a well-known manner thethreaded bolt. K upon which is adjustably mounted the stirrup K, securedto the fulcrum-pin d.

The outer ends of the cylinders D and I) are provided, respectively,with the nozzles D and D into which the pipes L and L are secured, sothat they will reciprocate with the cylinders D and D, the other ends ofsaid pipes extending, respectively, into the cylindrical water-chambersM and M, formed in a suitable casting secured above said cylinder B.

The joints where the pipes L and L pass into the said chambers M and Mmay be packed in any well-known manner; but I prefer the packing shownin Fig. 9, in which 6 is a composition bushing, c is the leatherpacking, and is a nut to crowd the packing into place.

To the platform N, located above the fleeting-engine, is secured thestand N, to the front side of which is secured the valve-chest N inwhich are mounted the vertical valvestems g g, which operate the valves9 g to open and close the ports in a well-known manner.

The inletpipe 71 communicates directly with the interior of thevalve-chest N while the exhaust-pipe 71- communicates with the chamber7L2 in the stand N, which chamber 7L2 is provided with the ports 71 its,which communicate with the interior of the valve-chest and arecontinually covered by the valves g g, so that the inlet-water isprevented from passing through the same without first passing throughthe fleeting-engine. Above the left-hand port 71, Figs. 19 and 30, is aport, '1',

which communi ates through the pipe t' with the back or left-hand end ofthe fleeting-engine cylinder, while below said port h is another similarport, i which communicates through the pipe 1' with the front orrighthand end of said cylinder.

Above the right-hand port it is a port, 70, which communicates throughthe pipe k with the chamber M, which in turn communicates through thepipe L and nozzle D with the interior of the small clamp-cylinder D,while beneath said port h is located a similar port, k whichcommunicates through the pipe a with the chamber M, from which the watermay pass through the pipe L and nozzle D to the cylinder D.

Each of the valvestems g g is connected at its lower end by means of thelinks I l to the inner end of the lever l, which is pivoted at Z to thecross-head Z and the opposite end of which is connected by the link tothe end of the lever Z, secured upon one end of the shaft 1, which ismounted in the stand Z, and has secured to its opposite end thehand-lever O, by which the valve may be operated to direct the waterthrough the upper or lower port, as desired, all in a well-known manner.

The cross-head Z is mounted in the guide m, Figs. 16 and 21, which issecured to the platform N, while to the lower end of said cross-head issecured the upper end of the link m, the opposite end of which ismounted upon the pin m secured to the enlarged. end of the link-shaft mat a short distance from the center of said shaft m, which is mounted ina bearing in the bracket m and has secured. to its other end the lever12, the outer end of which is connected by the rod 11 to the pantographP, of the usual construction, which is hung from the bracket 0, securedto the under side of the platforn N, and which has its free endconnected to the cylinder D, so that all motion of said cylinder will betransmitted through said pantograph to said connecting-rod n, the amountof movement, however, of said rod n being greatly reduced as comparedwith the movement of said cylinder.

The operation of my invention is as follows: The rightrhand lever O isfirst moved toward the frame N, (see Fig. 1,) thus raising the valve 9,so that the water may pass from the inlet-pipe h to the interior of thevalvechest N 2 and from this chamber through the lower port, W, to thepipe through which it is carried to the chamber M, from which it passesthrough the pipe L and nozzle D"in to the interior of the cylinder D,thus forcing the plunger D toward the brake-wheel J, and moving thelever E about its fulcrum-pin c, and causing the connecting-rod F tomove toward the fleeting-engine cylinder,which movement of the rod F istransmitted to the lever F, causing the same to move about its fulcrum(1, so that the endsof the fleeting-strap K will be brought nearertogether, thus securely clamping said wheel J in an obvious IIO L intothe chamber M, from which it passes through the pipe k to the port 70,along the valve 9 to the port 'h into the chamber W in the stand N, fromwhich it is carried away by the exhaust-pipe h. The wheel J beingsecurely clamped by the strap K, the lefthand lever O is moved towardthe frame N,

thereby moving the valve g, so as to uncover the port 6 so that thewater may pass through the same to the pipe i through which it iscarried to the front or right-hand end of the fleeting-engine cylinder.\Vhile thecylinder B is being thus filled, the piston B is being movedto the left or away from the brakewheel J by the action thereon of thewater being admitted to said cylinder from the pipe i As the piston Bmoves toward the lefthand end of the cylinder, the water contained inthat end is forced out through the pipe ql to the port d, through whichit passes along the valve g to the port 7L3 and the chamber 71.2, fromwhich the water is carried away by the exhaust-pipe h. The piston Bbeing connected by the piston-rod B to the side bars, 0 upon which thecylinders D and D are mounted, it is obvious that said cylinders, thepipes L and L, and the pin 0, mounted in the side bars, 0 G, will allconform to the reciprocating movements of the piston B, and since thepin 0 is oonnectedby the rod H to the pin d, mounted in the crosshead G,said cross-head G will also be reciprocated by the action of the waterupon the piston B; but by virtue of the curvature of the guides G G, inwhich said cross-head G is mounted, said cross-head will of necessitytravel in a path concentric with the axis of the shaft 1, so that thefulcrum-pin d will at all times remain the same distance from the rim ofthe wheel J. When said strap K is clamped to saidwheel J and saidcross-head G is moved toward the cylinderB, it is obvious that saidwheel J will be moved about its axis a distance equal or nearly equalto' the stroke of the piston B within the cylinder B. The movement ofthe cylinder Daway from the drum causes its motion to be transmittedthrough the pantographP to the rod '27, which in turn operates the lever'11, which turns in its bearing the shaft m so that the pin m will belowered, which motion will be transmit-ted through the link m to thecross-head Z causing the same to assume a lower position. As the upperend of said cross-head Z? is pivoted to the lever l at 1 said lever Z ismade to swing about the joint so that the free end of said lever Z islowered sufficiently to cause the valve g to cover both the ports 't'andt'flwhen no more Water can be transmitted to either end .of the fleetingengine cylinder, and consequently the movement ,of the piston B and theparts secured thereto will cease, and as said cylinder is filled withwater upon either side of said piston it will be locked, so that itcannot move in either direction. The length of stroke of said piston,and consequently the amount of move ment of said wheel J, may bepredetermined by the movement of the lever O. For instance, supposingthe piston B is at the righthand end of the cylinder B and it is desiredto move it into the position in which it is shown in the drawings, theoperator will move the right-hand lever O sufficiently to clamp thewheel J, and then he will move the lefthand lever 0 into the position inwhich it is shown in Fig. 16, and in which position it will 'be lockedto the frame r by the locking device 4, which may be of any well'knownconstruction. As has already been described, the water will pass throughthe pipe 1' to the front end of the cylinder B, causing the piston B tomove away from the drum; but as soon as the cylinder D has moved intothe position shown in the drawings its motioir willhave been transmittedthrough the automatic stopping device to cause the cross-head to belowered and operate the lever l and the valve g, so that they willassume the positions shown in the drawings, when the movement of saidpiston B will cease, as has already been described. This is accomplishedby virtue of the fact that as soon as the cylinder D begins to movetoward the cylinder B or away from the drum the cross-head l and valve 9will begin to be lowered, and if the valve 9 is in one case only movedby the lever O a short distance, so that it but partially uncovers theport i while in another case said valve is moved far enough to entirelyuncover said port 1' it follows that the valve g in the'first instance,having a shorter distance to travel, will cover both ports 1' and isooner than it would cover the same ports in the latter case, where thevalve must travela longer distance before the water is cut off frompassing to the cylinder B. By virtue of this fact it is obvious that anylength of stroke of the piston B may readily be determined, and if it isdesired that the piston should travel the entire length of the cylinderB the operating-lever is moved as far to the rear as possible, whichwill cause the valve g to be moved upward as far as it can go, so thatthe said valve will not be able to again cover both the ports 2' and 2'until the piston B has moved to the rear end of the cyilnder B. a

.In order to release the wheel J and move the parts back to their formerpositions preparatory to another grip-and-pull operation, the operatormoves the right-hand lever toward the left-hand side of Fig. 16, thusuncovering the upper port, it, and allowing the inlet-water to passthrough the same into the pipe through which it will be carried to thechamber M, and thence through the pipe 1/ and nozzle D to the interiorof the cylinder D, thus forcing the plunger D toward the cylinder D andreleasing'the clamp of the strap K upon the wheel J, the water in thecylinder D being forced out through the pipe L, the chamber M, the pipek the port 7:7 along the valve 9 to the port 7L3, into the chamber 71and away by the exhaust-pipe h. The operator will then move theleft-hand lever toward the left side of Fig. 16, thus lowering the valveg, so as to uncover the port- 1 so that the inlet-water may pass throughthe same into the pipe 'i, by which it is conveyed to the back end ofthe cylinder B, thus forcing the piston B toward the drum, and with saidpiston the cylinders D and D, which movement will operate the pantographP, the connecting-rod n, the lever 12, the shaft m the link 21!, and thecross-head I to again raise the end of the lever Z and the valve g, sothat said valve will again cover both of the ports 1' and It is obviousthat in this operation the strap K will be simply slipped around thewheel J without moving it about its axis.

It is evident that by clampingthe wheel J and allowing the cylinder B toremain filled with water, with the valve 9 over the ports 1' and thisdevice may be used as a brake.

\Vith the foregoing it is believed that the operation of my inventionwill be readily understood without further description, while itsadvantages are obvious.

lVhat I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. In combination with the brake-wheel of a hoisting-drum, areciprocating cross-head, a lever pivoted to said cross-head, a strapencircling said wheel and connected at one end to said cross-head and atthe other end with one end of said lever, and means for moving saidlever in one direction to clamp said strap to said wheel, so that saidwheel will move about its axis with said cross-head and in the oppositedirection to loosen the grip of said strap upon said wheel.

2. In combinationwith the brake-wheel of a hoistii'ig-drum, a cross-headreciprocating in a path concentric with the axis of said wheel,afulerum-pin mounted in said cross-head, a lever mounted upon said pin,a strap encircling said wheel and connected at one end to saidcross-head and at the other end with one end of said lever,areciprocating frame, a leverpivoted to said frame, arod connecting thelowerends of said levers, another rod connecting said cross-head andsaid sliding frame, two cylinders secured to said reciprocating frame,and a reciprocating plunger mounted in said cylinders and connected withthe upper end of the lever pivoted to said reciprocating frame.

In combination with the brake-wheel of a hoisting-drum, a fixedcylinder, a reciprocatin g piston mounted within said cylinder, a crosshead or frame mounted in suitable guides, a rod connecting saidcross-head with said piston, a lever mounted upon said crosshead, anengine-cylinder mounted upon and movable with said cross head or frame,a piston fitted to said cylinder and arranged to be reciprocated thereinand connected to one end of said lever, a second cross-head mounted inguides located beneath said brake-wheel and curved to an arc of a circleconcentric to the axis thereof, a rod connecting said two crossheads, alever pivoted at or near the center of its length to said secondcross-head, a brake-strap surrounding said brake-wheel and connected atone end to said second crosshead and at its other end to one end of thelever carried by said cross-head, and a rod connecting the other end ofsaid lever with the lever pivoted to the first-mentionedcross head orframe.

4. In combination with a fixed cylinder, a piston reciprocating in saidcylinder, a frame adapted to slide in suitable guides, a rod connectingsaid piston with said frame,'two cylin ders secured to said frame inaxial line with each other, a plunger mounted in said cylinders andextending from one to the other, a casting secured to said fixedcylinder and provided with two parallel water-chambers, a pipe securedto one of said sliding cylinders and extending into one of saidwater-chambers, another pipe secured to the other sliding cylinder andextending into the other water-chamber, and pipes leading to the outerends of said Water-chambers to admit the water thereto or exhaust ittherefrom, as the case may be, valves for controlling the flow of waterto or from said water-chambers, a two-armed lever pivoted to saidreciprocating frame and connected at one end to said plunger, abrake-wheel, a second cross-head located beneath said brake-wheel,curved slides for guiding said second cross-head in a path eoncentric tothe axis of said brake-Wheel, a second two-armed lever pivoted to saidsecond cross-head, a brake-strap surrounding said brake-wheel, a rodconnecting said recipro-v cating frame and second cross-head, and a rodconnecting the lower ends of the two twoarmed levers.

5. In combination with the brake-wheel of a hoisting-drum, a cross-headreciprocating in a path concentric with the axis of said wheel, afulcrum-pin mounted in said cross-head, a lever mounted upon said pin, astrap encircling said wheel and connected at one end to said cross-headand at the other end with one end of said lever, a reciprocating crosshead or frame, a lever pivoted to said frame, a rod connecting the lowerends of said levers, another rod connecting said cross-head and saidreciprocating frame, two cylinders secured to said reciprocating framein axial line with each other, a reciprocating plunger mounted in saidcylinders and extending from one to the other and connected to the upperend of the lever pivoted to said reciprocating frame, a fixed cylinder,a piston mounted in said fixed cylinder'and adapted to reciprocatetherein, and a rod connecting said piston to said reciprocating frame,so that said frame, 7

said cross-head, and said'piston will all move in unison. 1

6. In combination with the brake-wheel of a hoistinged'ru'm, areciprocating frame, two cylinders secured to said frame in axial linewith each other, a plunger mounted in said cylinders and extending fromone to the other, a lever pivoted to said reciprocating frame andconnected at one'end to said plunger, and pipes connecting with theouterends of said cylinders to admit water to reciprocate said plunger,across-head located beneath said brake-wheel and arranged to bereciprocated in a path concentric to the axis of said wheel, a two-armedlever pivoted to said cross-head, a brake-strapsurrounding saidbrake-Wheel and pivoted at one end to said cross-head andat its otherend to one end of the lever carried by said cross-head, and'a rodconnecting the other end of said lever with the lower end of thetwo-armed lever carried by said reciprocatingframe.

7. In combination with the brake-wheel of a hoisting-drum, areciprocating frame, a cylinder and piston for transmitting motion tosaid reciprocating frame, a valve-seat provided with an exhaust-port andanother port upon either side of said exhaust-port, pipes connectingsaid outer ports with the opposite ends of said cylinder, a valveadapted to cover all of said ports or either two of them, as desired, avalve-stem for operating said valve, a lever connected at one end tosaid valve-stem and at the other end to a fulcrumpin which is adaptedto'be raised or lowered at the will of the operator, a sliding crossheadpivoted at one end to said lever, and a series of links and leversinterposed between said reciprocating frame and said crosshead, bywhich, when said frame is moved away from the hoisting-drum, saidcross-head will be moved so that all the ports in the valveseat will beclosed by said valve.

8. Iii-combination with the brake-wheel of a hoisting engine and agripping or clamping device constructed and arranged to beintermittently clamped to and released from said wheel, a fixedcylinder, a piston working in said cylinder, a reciprocating frame orcross-head connected by a piston-rod. to said piston, a pair ofdifferential cylinders mounted upon and movable with said frame, adifferential plunger fitted tosaid cylinders and extending from one tothe other, a lever mounted on said frame and connected at one end tosaid difierential plunger and at its other end to the gripping device, apair of.

fixed water-chambers, pipes leading from the interior of saidwater-chambers to the opposite ends of said differentialcylinders, avalvechamber provided with two sets of ports leading therefrom and twovalves to cover said ports, pipes leading from the two outer ports ofone set to the opposite ends of the fixed cylinder, 'pipes'leading fromthe two outer ports of the other set to the interior of thewater-chambers, a cross-head connected at one end with the stem of thevalve that controls' the flow of water to the fixed cylinder,

and a system of links and rods connecting thejothe'r end ofsaidcross-head to one of said differential cylinders or to the frame onwhich said cylinder is mounted.

9. The combination of the fixed cylinder B, the piston B, the piston-rodB areciprocating cross head or frame connected to said piston-rod,thedifferential cylinders D and D,

mounted upon and movable with said reciprocating frame, a differentialplunger fitted to 'said differential cylinders and extending from one tothe other, the fixed water-chambers M and M, the pipes L and L, thevalvechamber N the two valves g g, the ports 2', 1 h 7?, lo, and k pipesconnecting ports i and v? with the opposite ends of the cylinder B,pipes connecting the ports 7t and k with the water-chambers M and M,respectively, the valve-rods g g, hand-levers 0, means for lockin'g oneof said'levers in any desired position, links Z and Z levers Z and Z thecross-head F, the pantograph P, the crank-shaft m levern, and rod n, allconstructed, arranged, and operating substantially as described.

10; In combination with the brake-wheel of a hoisting-drum, areciprocating cross-head, a

strap encircling said wheel and secured at one end to said cross-head, aframe reciprocating in unison with saidcross-head, a lever for causin gsaid strap to grip the said wheel when said cross-head is at one end ofits movement and to release the same when vat the other end of itsmovement, a pair of difierential cylinders mounted upon and movablewithsaid frame, a differential plunger fitted to said cylinders andextending from one to the other, a twoarmed lever pivoted to said frameand connected at its upper end to said plunger, a rod connecting theother end of said lever to the strap-clamping lever, a valve-seatprovided with three ports in line with each other,

a fixed cylinder, a piston adapted to reciprocate within said cylinderand connected with said frame, pipes connecting the ends of saidcylinder with two of the ports in said valveseat, a lever for operatingsaid valve to uncover either of the outer ports and allow water to passinto either'end of said cylinder and cause the piston, frame, andcross-head to be moved toward or from said drum, as may be desired, anda system of links and levers connecting said reciprocating frame withthe valve, and so arranged that it will cause said valve to cover saidports when said frame has moved a predetermined distance and prevent allfurther movement in that direction. In testimony whereof Ihave signed myname to this specification, in the presence of two subscribingwitnesses, on this 8th day of October, A. D. 1888.

ERASMUS D. LEAVITT, JR. Witnesses:

FRANCIS U: DEAN,

GEORGE E. WHrrNEY.

